Today is my 15th day in a row. I think I'm more proud of that than what I was able to accomplish today.

I didn't get nearly as much as I would have liked to done. I started reading the documentation for USCI UART in the User's Guide, I started to look at how MSPGCC generates interrupts in assembly. At about that time, I realized I'm not yet using the upstream Ti MSP430 GCC. I ended up downloading that, and fixing my code to compile with that toolchain, which was trivially adding a couple ampersands in front of some constants. It was actually more work to edit the Makefile to work out the MSP430 GCC toolchain directory. I find it slightly inconvenient to need to tell msp430-elf-gcc where to include standard headers from. Overall, I think the new toolchain is the right switch going forward.